Typewriter



C. GAGLIAZZO.

TYPEWRITER.

APPLICATION msu APR. 3, 1920.

Patented June 27, 1922.

2 SHEETS-SHEET l.

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C. GAGLIAZZO.

TYPEWRITER. APPLICATION FILED APR. 3. 1920.

1,42og99s.

Patented June 27, 1922.

2 SHEETS-SHEET 2.

IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIUI CARLO GAGLIAZZO, 0F RONCO BIELLESE,VIALE?.

TYPEWRITER.

Application led April 3,

To all whom-t may concern.'

Be it known that l, CARLO GAGLIAZZO, a subject of the King of Italy, andresident of Ronco Biellese, Italy, have invented certain new and usefulImprovements in Typewriters, of which the following is a speciiication.n,

This invention relates to typewriters and has for its object aconstruction of typewriter in which the carriage holder may be easilyremoved for the purpose of substitution. Y

This invention has further for its object means for controlling theshifting of said carriageholder and a `construction of carriage and of*lpaper holder mounted in the same allowing` of removing this paper holderwith paper therein from the carriage.

On the annexed drawing is shown by way of example a construction oftypewriter according to this invention and Figure 1 is a diagrammatictransverse section of a typewriter embodyingthis invention in which areomitted the parts which have no bearing on this invention; Figure 2 Visthe plan view of the paper holder and Figure 3 -is a side view ofthecarriage removed from the typewriterfframe but in cooperation with aguiding. part of the frame as hereinafter vdescribed.

As illustrated infFigure 1, the typewriter comprises a frame l'having`any required verse rod 8 to which shape and in which are mounted theseveral devices for the operation of the typewriter.r

On the drawing' is illustrated the'key device vin connection with one:key and associate type block but it is to'be understood that the numberof keys, type blocks and associate devices may be any desired one; f u

Said key device comprises a lever 2 connected by a rod 3 with a lever 4pivotedat 5 and having a hammer or blookG provided with tvpes intendedto strike the paper.

1920. Serial No. 370,914.

riageand'invwhich is mounted the paper holder hereinafter described.

Each arm 12 solid with guide bar 9 is engaged-by a rod 13 carried bylevers 14 pivoted at 15 at each end of the type frame; each lever -V14,is controlled by a rod 16 connected with the arm 17 of a crank lever 18pivoted at 19 and whose other arm 20 is provided with the shift key 21.

The paper holder which is `supported by end plates 24 of the carriageconsists of a frame (Figure 2) comprising two end plates 25 (see Figures2 and 3) interconnected by barsl 26; inr said frame are mounted theplaten roller 27 and the pressure rollers 28 intended to hold the paperon said platen roller.

The shaft 29 of the platen roller is pivoted in plates 25 and isprovided with usual and known means for rotating said roller eitherhander automatically at-the end of each Furthersaid shaft provides twojournals 3() adapted'to seat in seats or recesses 31 provided by the endplates 24 of they carriage.

The paper holder frame is provided with a lowerrod 32 engaged in astationary U- shaped fork 33 secured on the frame 1; the' recess of saidfork is open at its top portion and .provides two vertical guidingsurfaces contacting with said rod 32.

On the carriage frame 22424 is mounted the rack bar 34 .meshing with apinion 35 `which is controlled by a pawl device in such a manner as torotate to the extent of one Specification of Letters Patent.Patentdelune 27, 1922. i

4tooth at each operation of one of the keys so f as to .allow theprogression of the carriage v to one space after a type has beenimpressed on the paper. This pawl device is well known and therefore itis not described and illustrated. i

Said rack'bar 434'is'mounted on the carriage frame by means of pivots 37and is controlled by a lever 36 having an end 38 adapted to be operatedby the linger for the purpose of releasing said rack bar from thek thecarriage holder with the carriage fromV the typewriter for the purposeof using yat will on the same typewriter a number of carriages havingdifferent lengths; for this purpose the carriage holder 22-24L islifted. to disengage its hooks 11 from rod Sto which they are hanged7this being .allowed by the shape of hook l2 engaging the controlling rod13 and then it is easily removed from the typewriter and anothercarriage holder and carriage having any desired length is substitutedfor it.

The above described construction improves the operation of thetypewriter as it allows of using a carriage guide bar 9 having` aproperlengtlrin connection with each carriage so that each of thecarriages of dilferent lengths which may be used on the typewriteris'always truly guided in its motion.

Also the paper holder framewith platen and pressure rollers maybe-removed as a whole from the carriage so that it is possible to remove`at any time from the typewriter said paper holder with a number ofpaper sheets and interposed carbon paper sheets and tosubstitute for itanother paper holder to write on other sheets and iinally to replaceinthe typewriter thelirst paper holder.

For this purpose the .paper holder is merely lifted from its supportingbrackets or carriage side plates 24 to disengage. the journals 30 fromseats 31 and rod 32 from guiding fork 33; thus the paper holding framecomprising side plates 25, connecting rods 26 and platen and pressurerollers 27 and 28 may be removed as awhole from the carriage.

Another important feature of this invention consists in the operation ofthe carriage holder and carriage in connection with shifting of carriageunder the operation of the shift key intended rto obtain the impressionof either of types carried by each `type block.

As shown' on the drawing each type .block 6 is provided with two typesand the carriage is controlled b y a shift ykey 21 to carry theimpression line of the platen roller 27 in register with either of saidtypes.

'In the position illustratedon the drawing the platen roller is inposition to obtain the impression of the .lower one of the typesprovided on the type block 6. lVhen it is desired to impress the uppertype the shift key 2l is shifted and thus levers 14; are shifted to leftby means of crank 'lever 20-17 and of rod 16, and therefore the arms 10and carriageguide bar 9 are rocked to Vleft around axis of pivots 8together with paper holder and platen roller.

In this motion the paper holder is moved from a lower position in whichthe centre of the platen roller is at Ato an upper position in which thecentreof said platen is at B, but said paper holder and platen rollerare loosely supported by'thebrackets 24 Vand are slidably engagedbytherod 32 with the yholder and platen roller may be briefly de- 'iined ascausing said parts to be held paral- U-shaped guide 33; then during theclockwise rotation of the brackets 24 around pins 8 through the anglerequired for the shift, the holder 25 and platen 27 are prevented fromrotating` as apart solid with them, that is, they are caused to rotatecounterclockwise with regard to said brackets through the above statedangle. Thus the same generatriX orn the Aplaten which by the position Aof the platen roller was in condition to b e struck by the bottom typeis now in condition to be. struck by the top type of the block 6, and itis obtained that the types of either rrow ray be written on the sametrue horizontal line. At the samel time` by this construction, theplaten portion struck by the types is tangential with substantiallyparallel planes in both positions of the shift and therefore the typesof the block may be flat. This is a great advantage. over theconstructions in which the striking surface of the types must be shapedto follow ,the cylindrical shape of the platen.

The above described operation of the paper lel to their initial positionduring their oscillation 'with the vcarriage and carriage carrier fortype shifting` purposes.

A further advantage of the arrangement according to this invention isthat it allows of ,locating the rack lbar .34 in such a positionas to bealways in engagementwith the cooperating pinion during vthe shiftingofthe carriage and carriage holder, said rack bar being located at aproper distance from the axis of oscillation ofthe carriage holder sothat it moves along anarc which practically corresponds to a straightline; by this construction it .is no longer necessary to arrange thepinion 35 to movelongitudinally with regard to the bearings of its shaftrfor the purpose of holding it in engagement with the rack bar 34asrequired in some ofthe known constructions.

By this construction the vpinion 35 may be made solid with its shaft andthis latter may be pivoted in stationary bearings provided that saidpinion has a suitable length .to mesh with said rack `bar in allpositions ,taken up by the same when the carriage holder is shifted bythe operation of the shift key.

What I claim as my invention and desire to secure by United StatesLetters Patent is:

l. In a typewriter of the kind having` type blocks each provided with aplurality of types, a stationary frame, pivoting means in said frame, acarriage carrier removablyv hung upon said pivoting means, and controlAling .means .for shifting said carriage carrier around said pivotingmeans to obtain the impression of either of said types, said controllingmeans being removably engaged by said carriage carrier.

2. In a t pewriter of the kind having type blocks eaoi provided with aplurality of types, a stationary frame, pivoting means in said frame, acarriage carrier mounted in a removable manner on said pivoting means,controlling means for rocking said carriage carrier around said pivotingmeans to obtain the impression of either of said types, said controllingmeans being removably engaged with said carriage carrier, a carriagemounted to slide along said carriage carrier, a paper holder freelysupported in said oarriage and cooperating means on said stationaryframe and paper holder for holding said paper holder substantiallyparallel to its initial position during the rocking of said carriagecarrier and carriage for the type shift.

3. In a typewriter of the kind having type blocks each provided with aplurality of types, a stationary frame, pivoting means in said frame, acarriage carrier mounted in a removable manner on said pivoting means,controlling means for rocking said carrier around said pivoting means toobtain the impression of either of said type, said controlling meansbeing removably engaged witli said carriage carrier, a Carriage mountedto slide along said carriage carrier, a paper holder comprising a framein which are mounted the platen and pressure rollers, said paper holderbeing removably supported in said Carriage, a fork shaped guiding memberin said stationary frame and a bar mounted in said paper holder frameand engaging said fork member for guiding said paper holder.

t. In a typewriter of the kind having type blocks each provided with aplurality of types, a stationary frame, pivoting means in said frame, acarriage carrier mounted in a removable manner on said pivoting meansand carrying a carriage, controlling means for shifting said carriagecarrier around said pivoting means to obtain the impression oi either ofsaid types, said shifting means being removably engaged with saidcarriage carrier, a rack bar mounted in said carriage carrier, and acontrolling pinion meshing with said rack bar in all positions of saidcarriage carrier.

5. In a typewriter of the kind having type blocks each provided with aplurality of types, a stationary frame, pivoting means on said frame, acarriage carrier mounted in a removable manner on said pivoting meansand carrying a carriage, controlling means for shifting said carriageCarrier around said pivoting means to obtain the impression of either ofsaid types, said shifting means being removably engaged with saidcarriage carrier, levers pivoted in said carriage and carrying a rackbar, and a controlling pinion meshing withsaid rack bar in all positionsof said carriage carrier.

Signed at Turin, Italy, this 27 Feb., 1920.

CARLO GAGLIAZZO.

